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[Fizinfo] Atomki-szeminárium


Chronological Thread 
  • From: Zoltan Mate <mate AT atomki.mta.hu>
  • To: Fizinfo AT lists.kfki.hu
  • Subject: [Fizinfo] Atomki-szeminárium
  • Date: Fri, 23 Nov 2012 14:46:21 +0100 (CET)
  • List-archive: <http://mailman.kfki.hu/pipermail/fizinfo>
  • List-id: ELFT HÍRADÓ <fizinfo.lists.kfki.hu>

Az MTA Atommagkutató Intézetének előadótermében
(Debrecen, Bem tér 18/c. 12. ép. III. em.)
2012. november 29-én, csütörtökön 11:00-kor


Irka HAJDAS
(Laboratory of Ion Beam Physics, ETH Zurich)

Radiocarbon dating of lake sediments
for understanding of the past 50,000 yrs


címmel előadást tart.

Az előadás előtt 10:30-tól tea, vendégeket szívesen látunk.


Máté Zoltán


Kivonat:
Among continental archives lake sediments are nearly the most studied
records of past environmental changes. Certainly it is the wealth of proxy
(sedimentary information, tephra, pollen, stable isotopes, macrofossils,
geochemistry, palaeomagnetic, charcoal etc.) that can be recovered from
lake deposits that places them on top of the list. On the other hand there
other natural archives such as ice cores or tree rings that are considered
to be superb because of resolution and precise chronological time control.

After more than 20 years of applying 14C dating to building time scales of
various lakes around the globe I am still confident that lake sediments
are most valuable material to study. The great advantage of lakes is that
there are quite common and distributed around the globe. Global nature of
14C allows correlation and synchronisation. Moreover, new possibilities
and developments in AMS 14C dating increase chances for obtaining reliable
chronologies of those records.

I will present an overview studies and discuss various problems (such as
hard water effect) occurring in those records.


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